4.2×6.7+6.7×1.2+3.3×5.4简便计算

分类: 作业答案 • 2021-12-31 13:28:50

问题描述：

答

4.2×6.7+6.7×1.2+3.3×5.4
=6.7×(4.2+1.2)+3.3×5.4
=6.7×5.4+3.3×5.4
=(6.7+3.3)×5.4
=10×5.4
=54